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custom/Espo/Modules/Advanced/Business/Workflow/AssignmentRules/LeastBusy.php

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+<?php
+/***********************************************************************************
+ * The contents of this file are subject to the Extension License Agreement
+ * ("Agreement") which can be viewed at
+ * https://www.espocrm.com/extension-license-agreement/.
+ * By copying, installing downloading, or using this file, You have unconditionally
+ * agreed to the terms and conditions of the Agreement, and You may not use this
+ * file except in compliance with the Agreement. Under the terms of the Agreement,
+ * You shall not license, sublicense, sell, resell, rent, lease, lend, distribute,
+ * redistribute, market, publish, commercialize, or otherwise transfer rights or
+ * usage to the software or any modified version or derivative work of the software
+ * created by or for you.
+ *
+ * Copyright (C) 2015-2025 EspoCRM, Inc.
+ *
+ * License ID: 19bc86a68a7bb01f458cb391d43a9212
+ ************************************************************************************/
+
+namespace Espo\Modules\Advanced\Business\Workflow\AssignmentRules;
+
+use Espo\Core\Exceptions\Error;
+use Espo\Core\Exceptions\Forbidden;
+use Espo\Entities\Team;
+use Espo\Entities\User;
+use Espo\Modules\Advanced\Entities\Report;
+use Espo\Modules\Advanced\Tools\Report\ReportHelper;
+use Espo\Modules\Advanced\Tools\Report\Service;
+use Espo\ORM\Entity;
+use Espo\ORM\EntityManager;
+use Espo\ORM\Query\Part\WhereItem;
+use Espo\ORM\Query\SelectBuilder;
+
+use PDO;
+
+class LeastBusy
+{
+    /** @var EntityManager */
+    private $entityManager;
+    /** @var string */
+    private $entityType;
+    /** @var Service */
+    private $reportService;
+    /** @var ReportHelper */
+    private $reportHelper;
+
+    public function __construct(
+        EntityManager $entityManager,
+        Service $reportService,
+        string $entityType,
+        ReportHelper $reportHelper
+    ) {
+        $this->entityManager = $entityManager;
+        $this->reportService = $reportService;
+        $this->entityType = $entityType;
+        $this->reportHelper = $reportHelper;
+    }
+
+    /**
+     * @param array<int|string, mixed>|WhereItem|null $whereClause
+     * @return array<string, mixed>
+     * @throws Forbidden
+     * @throws Error
+     */
+    public function getAssignmentAttributes(
+        Entity $entity,
+        string $targetTeamId,
+        ?string $targetUserPosition,
+        ?string $listReportId = null,
+        $whereClause = null
+    ): array {
+
+        $team = $this->entityManager->getEntityById(Team::ENTITY_TYPE, $targetTeamId);
+
+        if (!$team) {
+            throw new Error("LeastBusy: No team $targetTeamId.");
+        }
+
+        $where = [
+            'isActive' => true,
+        ];
+
+        if ($targetUserPosition) {
+            $where['@relation.role'] = $targetUserPosition;
+        }
+
+        $userList = $this->entityManager
+            ->getRDBRepository(Team::ENTITY_TYPE)
+            ->getRelation($team, 'users')
+            ->select('id')
+            ->order('userName')
+            ->where($where)
+            ->find();
+
+        if (is_countable($userList) && count($userList) === 0) {
+            throw new Error("LeastBusy: No users in team $targetTeamId.");
+        }
+
+        $userIdList = [];
+
+        foreach ($userList as $user) {
+            $userIdList[] = $user->getId();
+        }
+
+        $counts = [];
+
+        foreach ($userIdList as $id) {
+            $counts[$id] = 0;
+        }
+
+        $selectBuilder = SelectBuilder::create()->from($this->entityType);
+
+        if ($listReportId) {
+            /** @var ?Report $report */
+            $report = $this->entityManager->getEntityById(Report::ENTITY_TYPE, $listReportId);
+
+            if (!$report) {
+                throw new Error("No report $listReportId.");
+            }
+
+            $this->reportHelper->checkReportCanBeRun($report);
+
+            $selectBuilder = $this->reportService->prepareSelectBuilder($report);
+        }
+
+        $selectBuilder
+            ->where([
+                'assignedUserId' => $userIdList,
+                'id!=' => $entity->hasId() ? $entity->getId() : null,
+            ])
+            ->group('assignedUserId')
+            ->select([
+                'assignedUserId',
+                ['COUNT:(id)', 'COUNT:id'],
+            ])
+            ->order([])
+            ->order('assignedUserId')
+            ->leftJoin('assignedUser', 'assignedUserAssignedRule')
+            ->where(['assignedUserAssignedRule.isActive' => true]);
+
+        if ($whereClause) {
+            $selectBuilder->where($whereClause);
+        }
+
+        $sth = $this->entityManager
+            ->getQueryExecutor()
+            ->execute($selectBuilder->build());
+
+        $rowList = $sth->fetchAll(PDO::FETCH_ASSOC);
+
+        foreach ($rowList as $row) {
+            $id = $row['assignedUserId'];
+
+            if (!$id) {
+                continue;
+            }
+
+            $counts[$id] = $row['COUNT:id'];
+        }
+
+        $countValues = array_values($counts);
+
+        if (!count($countValues)) {
+            return [];
+        }
+
+        $minCount = min($countValues);
+        $minCountIdList = [];
+
+        foreach ($counts as $id => $count) {
+            if ($count === $minCount) {
+                $minCountIdList[] = $id;
+            }
+        }
+
+        if (!count($minCountIdList)) {
+            return [];
+        }
+
+        $attributes = [];
+
+        $attributes['assignedUserId'] = $minCountIdList[array_rand($minCountIdList)];
+
+        /** @var ?User $user */
+        $user = $this->entityManager->getEntityById(User::ENTITY_TYPE, $attributes['assignedUserId']);
+
+        if ($user) {
+            $attributes['assignedUserName'] = $user->getName();
+        }
+
+        return $attributes;
+    }
+}